Injector.



. YPa'nanted Nov. 27, |900. H. T. mcs.

macros; (Application mea sept. 7. 1699.)

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No. 662,466. Y Patented Nov. 27, |906.

H. T. Nlce.

INJECTOR.

l (Application filed Sept. 7` 1899.! xlodel.) l 2 Sheets-Sheet 2.

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UNITED STATES HORACE T. NICE, OF WADSVVORTH, OHIO.

I N J E C T O R SPECIFICATION forming part of Letters Patent No.662,460, dated November 27, 1900.

Application filed September 7, 1899. Serial No. 729,690. (Model.)

To @ZZ 11171/0717, it may concern:

Be it known that I, HORACE T. NICE, a citizen of the United States,residing at /Vadsworth, county of Medina, and State of Ohio, haveinvented certain new and useful Improvements in Injectors, fullydescribed and represented in the following specification and theaccompanying drawings, forming a part of the same.

This invention relates to improvements in injectors, and particularly tovalve mechanism therefor, it being the object of the present invention,generally stated, to provide an injector capable of handling extremelyhot water, such as required for locomotive use, and which will operateand maintain the stream or jet of steam-forced water under extremeconditions of feed-water and steam.

The improvements of the present invention are applicable to injectors ofboth the single and double jet types; but as they have been designedwith particular reference to injectors of the double-jet type and asthey have peculiar advantages in such injectors they Will forconvenience be hereinafter described in detail in that connection, itbeing understood, however, that the invention, broadly considered, isnot to be so limited.

In the accompanying drawings, Figure l is an irregular sectionalelevation of an injector of the double-jet type embodying the presentinvention, parts being broken away, so as to include in this View theovertiow valve mechanism of the injector, to which the present inventionparticularly relates. Fig. 2 is a cross-section on the irregular line 2of Fig. 1, and Fig. 3 is a cross-section on the irregular line 3 of saidfigure.

Referring to said drawings, 1 represents the steam-inlet, 2 thewater-inlet, and 3 the water-chamber, these parts being located on thereceiving side of the injector. On the delivery side of the injector isthe deliverychamber 4, to which is removably connected a boilerconnection 5, containing the ordinary check-valve The water-chamber 3and delivery-chamber 4 communicate through overflow-openings with anoVeriioW-outlet 7, terminating in a waste-nozzle 8, leading to theatmosphere. The water and delivery chambers 3 4 are, as will beobserved, separated by a vertical partition 9, and each communicatesindependently'of the other and directly with the overflow-outlet 7, theprimary over- Iiow entering an outlet from chamber 3 and the secondaryoveriiow from chamber 4.

The water-inlet 2 and water-chamber 3 (the injector shown being of thedouble-jet type) are connected by a lifter-tube 10, secured in ascrew-threaded opening in the partition 11, separating said inlet andchamber, said liftertube being provided with a steam-nozzle 12,similarly secured in position in the injectorcasing. The water-chamber 3and deliverychamber 4 are connected by a forcer-tube 13, secured in thepartition 9, these two chambers being closed to each other,exceptthrough this forcer-tube. The forcer-tube 13 is also provided with asteam-nozzle 14, secured in a screw-threaded opening in the partition15, separating the water chamber 3 from the steam-inlet 1, and inclosedat its tubular receiving end, which opens into the steam-inlet 1 by avalve-seat ring 16, similarly secured in the injector-casing, therebeing provided between said valve-seat ring 16 and the tubular receivingend of the steam-nozzle 14 an annular space forming a continuation ofthe passage 17, through which the lifter steam-noz- Zle 12 communicateswith the steam-inlet 1. Communication between the lifter and forcersteam-nozzles 12 14 is controlled by a spindlevalve 18, provided with aplug 19, adapted to enter the tubular receiving end of the forcersteam-nozzle 14, and with a shoulder 20, adapted to engage acorrespondingly-shaped seat formed in the valve-seat ring 16, thespindle of this valve projecting through a stuffing-box 21, secured tothe injector-casing, and being connected by apin-and-slot connection toa-handlever 22, fulcrumed in a bracket 23, secured to theinjector-casing. The plugl 19 and shoulder 20 of the valve 18 and theforcer steamnozzle 14 and valve-seat ring 16 are so constructed andarranged relatively to each other that'during the first part of therearward movement of the hand-lever 22 the shoulder 2O will be withdrawnfrom its seat against the valve-seat ring 16, thereby openingcommunication between the steam-inlet 1 and the lifter steam-nozzle 12.The plug 19 of the valve, however, still remains in the tubularreceiving end of the forcer steam-nozzle 14 and shuts oif communicationbetween that IOO nozzle and the steam-inlet, communication between theforcer steam-nozzle 14 and steaminlet l not being established until thehandlever 22 has been moved to substantially its rearmost position andthe hand-lever not being so moved until after the lifter has beenestablished, or, in other Words, until the Water-chamber 3 has beensupplied by the operationof the lifter with the required quantity ofwater for the operation of the forcer.

The overflow-openings from Water-chamber 3 and delivery-chamber 4 areprovided with overiioW-valves 24 25, respectively, adapted to beactuated, respectively, by the primary overliow from chamber3 and by thesteamforced water in delivery-chamber 4 as the forcer is established,each of these valves when so actuated in turn actuating the otherthrough connections which will now be described. These connectionsconsist of a lever 27 of the rst class fulcrumed in the injector-casing,the primary overflow-valve 24 being preferably connected to one end ofthis lever and the connection being suiciently loose to insure properseating of the valve. The secondary overflow-valve 25 is preferablydisconnectedtfrom the opposite end of the lever 27, but occupies such aposition relatively thereto that as said valve 25 is closed by thepressure of the steam-forced water in the delivery-chamber4it willengage that end of the lever 27, and thereby rock said lever and closethe primary overflow-valve 24, and when the latter valve is opened bythe primary overliow from Water-chamber 3 valve 25 will in turn beopened by the lever 27.

` The valves 24 25 rest against valve-seat rings 28 29 in theoverflow-openings.

When, as in the present case,the valve 25 is disconnected from the lever27, its stem 30, which passes through a guide 3l in the valveseat ring29, will preferably be provided at its upper end with a collar 32, whichby engagement with the upper side of said guide 3l Will limit the downward movement of said valve 25.

By means of these connections the primary overlioW-valve 24 is closedand held closed positively by the pressure on the delivery side of theinjector and is not affected by variations Which may occur in thepressure or temperature of steam or Water on the receiving side of theinjector. This is of peculiar advantage in double-jet injectors, as insuch injectors the overflow valve mechanism when closed is constantlysubjected to the pressure of the lifter, which has a tendency to unseatthe overow valve or valves.

Means are provided whereby the relative positions of the valves 24 25and lever 27 may be adjusted to compensatafor wear in any ot' theseparts or for other purposes, the means employed preferably consisting ofa set-screw 33,.threaded in the end of the level' 27 and engaging andengaged by valve 25, which setscrew may be adj usted to any desiredposition With relation to valve 25 and held in such adjusted position bya jam-nut 34.

As the pressure on the receiving and dev 1ing side, it is necessary thatoverflow-valves 24 25 should be so constructed or arranged relatively toeach other that the valve 24 may be opened and held open (the valve 25being also held open thereby) by the primary overliow against thepressure on the delivery side of the injector until the forcer isestablished and be closed and held closed by the valve 25 When theforcer is established against the pressure on the receiving side of theinjector. Heretofore in injectors employing two overflow-valves onopposite sides of the. injector it has been necessary in order that thevalves may be operated in turn and at the proper time tovary the sizesof the two valves relatively to each other, or, in other Words, to makethe secondary overflow-valve smaller in area than the primaryoverliow-valve, and in addition to this to make the valves and theiroverioW-openings of sufficient size to permit the proper amount ofoverflow to establish the lifter and forcer. This has been diflicult, asit has not always been found possible to construct the valves so as tomeet both of these conditions, as it frequently happens that the valves,though of the proper size relatively to each other, are not each of theproper size for the amount of overflow required, and vice versa. torsthis difficultyis particularly serious, as in such injectors the primaryvalve is constantly subjected to the pressure of the lifter, which has atendency to unseat it. This difficulty is entirely overcome in thepresent case by the provision of the lever 27, which in addition to theadvantage before referred -to of causing the primary overflowyalve 24 tobe held closed positively by the valve 25 against the pressure on thereceiving side of the injector and variations in such pressure has thefurther important advantage that by its employment the primary andsecondary overflow-valves may be constructed without reference to therelative pressures on opposite sides of the injector and solely withreference to the amount of overiiow required. To adapt the valves 24 25,which, as shown, are substantially of the same area, to the pressures onopposite sides of the injector, the lever 27 is fulcrumed at one side ofits center and toward the valve 25, the position of the fulcrum beingdetermined by the relative areas of the valves 24 25. With the fulcrumin this position the valve 24, and through it the valve 25, is readilyopened and held open by the pri mary overiiow until the establishment ofthe forcer, when it is closed and held closed by the valve 25, actuatedby the pressure of the steam-forced water on the delivery side of theinjector.

The operation of the apparatusis as follows: Normally the secondaryoverii'ow-valve 25 will IOO In double-jet injec- Y IIO IIS

be in its lowermost position, which it assumes by gravity whendisconnected from the lever 27, as in the present case, so that theinjectorcasing is open to the atmosphere, and thus cooled. Normally alsothe valve 1S is in engagement with the valve-seat ring 16 andl forcersteam-nozzle 14, thus shutting oi communication between the forcer andlifter steam-nozzles 12 14 and the steam-inlet 1. To start theapparatus, the hand-lever 22 is moved to the left, Fig. l, sufficientlyto disengage the shoulder 2O of said valve from the valve-seat ring 16,thus opening communication between the steam-inlet 1 and the liftersteam-nozzle 12. Communication still remains cut off, however, betweenthe steam-inlet and the forcer steam-nozzleby the plug 19. The steampassing through the lifter steam-nozzle 12 and lifter-tube 10 will enterthe watercham ber 3 and raising the valve 24 will pass into theOverflow-outlet 7, and thence to the atmosphere through the nozzle 8. Assoon as water appears at the outlet 8 or it is otherwise indicated tothe attendant that the injector is supplied with the proper quantity ofwater he will move the hand-lever 22 to its real-most position, thusopening communication between the steam-inlet 1 and forcer steam-nozzle14. Steam passing through the forcer-tube 13 will enter thedelivery-chamber 4 and at iirst escape through the overflowopeningtherein, the valve 25 being maintained in its open position through thelever 27 by the valve 24. As soon as the jet of steam-forced water isestablished. through the forcer 13 the pressure in delivery-chamber 4will be so increased as to raise the valve 25, and thus arrest theoveriiow from that chamber and at the same time through the lever 27,which the valve 25 engages when it is thus moved, close the valve 24,and thus arrest the overiiow from the water-chamber 3. So long as thejet is maintained the valve 24 and valve 25 will be maintained in theirclosed position positively by the pressure in the deliverychamber4, nomatter what changein pressure may take place in the water chamber 3.Should theinjector break or fly off, the pressure in thedelivery-chamber4 and in the water-chamber 3 will become equalized and the overflow fromboth again opened by the opening of the valve 24 and through the lever27 of the valve 25. 4The valves 24 and 25 will remain in this openposition, as in starting, until the proper conditions are reestablishedin the injector-casing, when the injector will automatically restart. Tostop the operation of the apparatus, all that is necessary to be done isto move the steam-valve lSinto position to shut oil' communicationbetween both the lifter and forcer steam-nozzles and the steam-inlet 1.

The injecter will preferably be provided with a spindle-valve 36 forregulating the supply of steam to the lifter steam-nozzle 12. It willalso preferably be provided with a valve 37 'for engaging and lockingthe overflow-valve 24 in closed position, so that the steam admitted tothe injector may be forced down the water-inlet 2 for the purpose ofheating the water-supply.

What I claim isl. In an injector, the combination with a primaryoverhow-valve adapted to be opened by overliow on the receiving side ofthe injector and a secondary overow-valve adapted to be closed by thepressure of the delivery side as the forcer is established, of leverconnections between the valves, substantially as described,

2. In an injector, the combination with a primary overiiow-valve adaptedto be Opened by overflow on the receiving side of the injectorand asecondaryovertlowevalve adapted to be closed by the pressure of thedelivery side as the forcer is established, of a lever of the firstclass between the valves, substantially as described.

3. In an injector, the combination with a primary overiiow-valve adaptedto be opened by overiiow on the receiving side of the injector and asecondary overflow-valve adapted to be closed by the pressure of thedelivery side as the forcer is'established, of alever of theiirst classbetween the valves, the fulcrum thereof being located at one side of itscenter and toward the secondary overflow-valve, substantially asdescribed.

4. In an injector, the combination with a primary overfiow-valvc adaptedto be opened by overflow on the receiving side of the injector and asecondary overflow-valve adapted to be closed by the pressure of thedelivery side as the forcer is established, of adjustable connectionsbetween the valves, substantially as described.

5. In an injector, the combination with a primary overiiow-valve adaptedto be opened by overflow on the receiving side of the injector and asecondary overiiow-valve adapted to be closed by the pressure of thedelivery side as the forcer is established, of adjustable leverconnections between the valves, substantially as described.

G. In an injector, the combination with a primary overliow-valve adaptedto be opened by overiiow on the receiving side of the injector and asecondary overflow-valve adapted to be closed by the pressure of thedelivery side as the forcer is established, of a lever of the firstclass between the valves but disconnected from one of them, andadjustable engaging means between said lever and said valve,substantially as described.

7. ln an injector, the combination with a primary overflow-valve adaptedto be opened by overdow on the receiving side of the injector and asecondary overflow-valve adapted to be closed by the pressure of thedelivery side as the forcer is established, of a lever of the firstclass between the valves but disconnected from the secondary valve, andadjustable engaging means between said lever and said valve,substantially as described.

IOO

IIO

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8. In an injector, the combination with a primary overlow-valve adaptedto be opened by overflow on the receiving side of the injector and asecondary overflow-valve adapted to be closed by the pressure of thedelivery side as the forcer is established, of a lever of the iii-stclass between the valves but disconnected from the secondary valve, andadjustable means borne by the lever for engaging said valve,substantially, as described.y

9. The combination with Water-chamber 3 and delivery-chamber 4, ofoverflow-valves 24, 25, and lever 27 between said valves, substantiallyas described.

l0. The combination with water-chamber?) and delivery-chamber 4, ofoverliow-valves 24, 25, and lever 27 between said valves and having itsfnlcrum at one side of its center and toward the valve 25, substantiallyas described.

ll. The combination with Water-chamber 3 and delivery-chamber 4, ofoverflow-valves 24, 25, and lever 27 between said valves, the valve 25being disconnected from but adapted to engage said lever, substantiallyas described.

l2. The combination with water-chamber 3 and delivery-chamber 4, ofoverflow-valves A24, 25, and lever 27 between said valves, the

valve 25 being disconnected from but adapted to engage said lever, andsaid lever being provided with set-screw 33, substantially as described.

13. The combination with Water-chamber 3 and delivery-chamber 4, ofoverflow-valves 24, 25, and lever 27 between said valves, the valve 25being disconnected from but adapted to engage said lever, the fulcrum ofsaid lever being at one side of its center and toward the valve 25,substantially as described.

In testimony whereof I have hereunto s'et my hand in the presence of twosubscribing witnesses.

HORACE T. NICE.

Witnesses:

CHAs. AMMERMAN, W. H. NICE.

